r1 = 0.05;
r2 = 0.25;
r3 = 5.0;
q1 = 0.01;
q2 = 0.05;
q3 = 1.0;
Point(1) = {0, 0, 0, q1};
Point(2) = {r1, 0, 0, q1};
Point(3) = {-r1, 0, 0, q1};
Point(4) = {0, r1, 0, q1};
Point(5) = {0, -r1, 0, q1};
Point(6) = {r2, 0, 0, q2};
Point(7) = {-r2, 0, 0, q2};
Point(8) = {0, r2, 0, q2};
Point(9) = {0, -r2, 0, q2};
Point(10) = {r3, 0, 0, q3};
Point(11) = {-r3, 0, 0, q3};
Point(12) = {0, r3, 0, q3};
Point(13) = {0, -r3, 0, q3};
Circle(1) = {2, 1, 4};
Circle(2) = {4, 1, 3};
Circle(3) = {3, 1, 5};
Circle(4) = {5, 1, 2};
Circle(5) = {7, 1, 9};
Circle(6) = {9, 1, 6};
Circle(7) = {6, 1, 8};
Circle(8) = {8, 1, 7};
Circle(9) = {12, 1, 10};
Circle(10) = {10, 1, 13};
Circle(11) = {13, 1, 11};
Circle(12) = {11, 1, 12};
Line Loop(15) = {11, 12, 9, 10, -8, -7, -6, -5};
Plane Surface(15) = {15};
Line Loop(17) = {5, 6, 7, 8, -2, -1, -4, -3};
Plane Surface(17) = {17};
Line Loop(18) = {3, 4, 1, 2};
Plane Surface(18) = {18};
